The Leupold Golden Ring 12-40x60mm HD spotting scope uses high definition, calcium fluoride lenses and the Leupold exclusive Index Matched Lens System to achieve a level of clarity at high power that s never before been achieved. The soft side, form fitting case protects your optics, and can stay on the scope during use. Armor coated, rugged, waterproof, and covered by the Leupold full lifetime guarantee.